On many issues. Whether on immigration, on which the ECJ has the final say, or on nuclear safeguards, ending the ECJ’s jurisdiction is integral to leaving the European Union, and the two cannot be divorced.
To resume my point—in the UK, EU citizens’ rights will be upheld by implementing the agreement in UK law. In the interest of the consistent interpretation of citizens’ rights, the UK has agreed that a narrow group of issues will be referred to the ECJ for interpretation, with due regard to whether relevant case law already exists. That will be up to our courts and they will make the final judgment, not the ECJ. In practical terms, that is a very limited role: our courts refer only two or three cases of that kind to the ECJ every year. In any case, there is a sunset clause after which that voluntary reference to the ECJ will come to an end. In short, any continuing role for the ECJ in our legal system will be voluntary, narrowly defined, and time limited.
A further reason why the Government seek to continue their negotiations with the EU rather than to leave before March 2019 is the advantage gained by securing an implementation period, as set out by the Prime Minister in her Florence speech. The implementation period will be strictly time-limited and mutually beneficial —it will be in everyone’s interests. Let me be clear: it is about not delay, but preparation.
An implementation period is essential to make the most of Brexit. We want to leave the EU, but we want to leave successfully. We want to base the long-term trajectory of our country as an independent nation outside the EU on prosperity, growth and taking back control. The best way to achieve that is by causing the least disruption.
An implementation period is important because businesses and public services will have to plan for only one set of changes in the relationship between the UK and the EU. At the end of that period, all our systems, procedures and structure will be in place and ready to go. There will not be one set of changes in 2019 and one at a later date. Many hon. Members have spoken on behalf of the business community, which has been clear about the importance of the implementation period to its planning. An implementation period provides certainty, which is a clear advantage and one of the key reasons why the Government are seeking to make a beneficial deal with the EU, rather than to leave prior to March 2019.
I thank hon. Members for their contributions to this interesting debate. To reiterate, there is no doubt that we are leaving the EU, the customs union and the single market. We are seeking a new future partnership with the EU in the second phase of negotiations, and we neither want nor expect a “no deal” or a “punishment deal”. We are confident that we can achieve a mutually beneficial deal that delivers on the will of the British people.
The next phase will not be easy—far from it. We can expect difficult moments and challenges.